126      * @param   int    $upper       Upper bound value.
132         $upper          = null,  argument
139         if (null === $upper) {
140             $upper = $this->_parameters->getParameter('integer.max');
144             if ($lower > $upper) {
148                     [$lower, $upper]
152             return $this->_getInteger($lower, $upper);
158         $upper -= count($exclude);
160         if ($lower > $upper) {
164                 [$lower, $upper]
168         $sampled = $this->_getInteger($lower, $upper);
185      * @param   int  $upper    Upper bound value.
188     abstract protected function _getInteger($lower, $upper);  argument
194      * @param   float   $upper    Upper bound value.
197     public function getFloat($lower = null, $upper = null)  argument
208         if (null === $upper) {
209             $upper = $this->_parameters->getParameter('float.max');
217         if ($lower > $upper) {
220                 2, [$lower, $upper]);
223         return $this->_getFloat($lower, $upper);
230      * @param   float      $upper    Upper bound value.
233     abstract protected function _getFloat($lower, $upper);  argument